barnes



2 Sheets-Sheet 1.

(No Model.)

l W. F. BARNES.

PRESS.

No. 304,594. Patented Sept'. 2, 1884.

j rz}- 5E \\\\wg (No Model.) 2 Sheets-Sheet 2.

W. P. BARNES.

' PRESS. l NU. 304,594. Patented Sept. 2, 1884.

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UNTTH STATES ATnNT Trice@ VILLIAM F. BARNES, OF ROOKFORD, ILLINOIS, ASSIGNOR TO NV. F. AND JOHNl BARNES, OF SAME PLACE.

:SPECIFICATION 'forming part of Letters Patent No. 304594:, dated September 2, 1884.

Application filed July 25,1884. (No model.)

This lever c is held in place to oscillate about Toa/ZZ whom t may concern:

Be it known that I, WILLIAM F. BARNEs, a citizen of the United States, residing in the city of Rockford, in the county of Wlinnebago and State of Illinois, have invented a new and useful Press, of which the followingis a speciication.

4This invention relates to a class of presses known as the screw-press;77 and its object is to produce at a small cost a screw-press capable of use for most of the purposes for which a press of its class is required, and of a construction to permit the press to be quieklyadjusted to any point within its capacity. To this end I have designed and constructed the press represented in the accompanying drawings, in which- Figure 1 is an isometrical representation of a press embodying my invention. Fig. 2 is a vertical central section cut on a line passing through the axial center of the guide-screws and press. Fig. 3 is a transverse central seetion of the cross-head cut on dotted line x on Fig. 2. Fig. 4 is an under face view of the eross-head with the toggle-leversin line. Fig. 5 is an under face View of the erosshead with the toggle-levers contracted, and Fig. 6 is a transverse central section of the ratchet mechanism on dotted line y on Fig. 2.

The pedestal of the .press represented in the figures is produced of cast-iron, and consists of a cylindrical tubular shaft, A, circular base B, and circular press-cap O, elongated on opposite sides, forming ears D, which furnish supports for the guide-screws.

At E are represented screwthreaded guides, having their lower ends iitted to enter holes formed in the ears D, in which they are fixed under face of the cross-head, having its pivotal center concentric with the press-screw.

its center by means of a flanged thimble, d, fixed in place on the cross-head, concentric with the press-screw, by means of screws c,

passed through the flanged thiinble d and ing one end pivotally connected with the ears v h, and their other ends pivoted to the semiscrew nuts by means of screws 7c, which extend through slotted openings Z, formed in the under face of the cross-head, and are screwthreaded into the semi-screw nuts. By this arrangement` of levers it will be seen that when the levers are extended, as shown in Fig. 4L, the semi-screw nuts will be held in screw-threaded connection with the screwguides to fix the cross-head in its adjusted position thereon, and when the levers are contracted, as shown in Fig. 5, the semi-screw nuts will be withdrawn from their connection with the screw-guides, and permit the ready adjustment of the cross-head to any position -on the guides.

At m are represented piirs'tuds fixed in the under face of the cross-head to limit the oseillatory movement of the togglelevers.

At I are represented sheaves supported in yokes K, to revolve therein on suitable bearings. The yokes Kare fitted with a socket to receive the journal-formed upper end of the guide-screws, and are xed thereon, when adjusted to position, by means of set-screws n.

At L are represented cords, preferably of the wire-cable variety, having a suitable con nection with the v.upper face of the cross-head, from which they extend over the sheaves I, and depend on the outsideof the screw-guides, and to their depending ends are attached suitable counter-weights, M, to properly balance the cross-head and its attachments in a manner to be readily adjusted vertically on the guide-screws.

At` N is represented a press-screw having a screw-thread connection vertically with the center of the cross-head. The depending end of this press-screw is provided with a presscap, o, held in place thereon in a free manner by means of a rod, p, screw-threaded into the cap, and its inner end entering an annular y groove formed in the depending journal end IOO of the press-screw. The outer end of the rod p is forked to embrace the screwguide to move vertically thereon in afree manner, and serves to prevent rotation of the cap.

At I? is represented a yoke-formed leverhead, fitted to oscillate on the upper end j ournal-formed portion of the press-screw, and its outer end is produced in socket form to receive a lever-bar, It, in a removable manner.

At T is represented a spur-toothed ratchetwheel fixed to the upper journal portion of the press-screw between the jaws of the leverhead.

At s is represented a double-acting springactuated pawl centrally pivoted within the jaws of the lever-head, in position therein relatively with the ratchet-wheel in such a manner that the end of either arm of the pawl may be made to engage the teeth of the wheel. This pawl is provided at with a vertical socket, in which is placed a spring-actuated plungerbolt, having its lower end produced in conic form to enter conic countersink-holes b, formed in the upper face of the lower jaw of the leverhead, in such position relatively with each other and with the position of the plunger-bolt as to hold one or the other of the ends of the pawl in contact with the ratchet-wheel. As the plunger-bolt is engaged with one or the other of the countersink-holes, also that when the plunger-bolt is between the countersink-holes both ends of the pawl will be held out of contact with the ratchet-wheel and permit the press-screw to be turned in either direction by means of the hand-crank a, fixed on its upper end.

In the use of my improved press the holes formed in the circular base B of the pedestal serve to receive bolts to fix it in position. The work is then placed in position on the presstable. The cross-head is then adjusted and iiXed on the vertical guides in the required position for the work. rlhen by means of a vibratory movement of the lever R and the spring-actuated pawl s, in the position shown in Fig. 6, the press-screw will be made to descend upon the work with any force within the limits of the press. After the work is completed the position of the pawl s is changed opposite to that shown in Fig. 6, when a vibratory movement of the leverR will cause the press-screw to rise and liberate the work.

In the foregoing I have described my irnproved press constructed with screw-guides on which the cross-head is made adjustable; but evidently other forms of guides-such as the toothed rack or ratchet-bar of any of the knownv forms capable of use in connection with a cross-head made adjustable thereon, substantially in the manner shown, and hereinbefore described-would be within the scope of my invention; also, other known forms of clutching mechanism than the form shown, and

hereinbefore described, may be employed to fix the cross-head in position on the guides when adjusted, withoutl departing from the gist of my invention, so long as the cross-head is made adjustable on the guides for the purpose of adjusting the press to the work. In this instance I have shown my improvements in a vertical form of press; but they are capable of use in a horizontal form, in which construction the counter-weights will not be required, and a radial side opening in the presstable will enlarge the scope of its usefulness.

I claim as my inventionl. The combination, with a press cap or table, of guides rising from the table to support a cross-head made adjustable thereon, substantially as and for the purpose set forth.

2. The combination, with the press-table and with guides connected therewith, of a cross-head made adjustable on the guides, and a clutching mechanism to connect the crosshead with the guides, substantially as and' for the purpose set forth.

3. rIhe combination, with a press cap or table, of screw-guides rising from the table to support a cross-head made adjustable thereon, substantially as and for the purpose set forth.

4. The combination, with the screw-guides .and with a press-table, of a cross-head provided with semi-screw nuts to engage the screw-guides, substantially as and for the purpose set forth.

5. The combination, with the cross-head and with the semi-screw nuts, of the togglelever mechanism, substantially as and for the purpose set forth.

6. The combination, with the screw-guides and with a cross-head, of semi-screw nuts and IOC) a toggle-lever mechanism, substantially as A herein described, as and for the purpose set forth.

7. The combination, with the screw-guides and with the cross-head made adjustable thereon, as described, of counter-weights to balance the cross-head, substantially as and for the purpose set forth.

8. The combination, with the cross-head and with the screw-guides, of a press-screw having a screw-threaded connection with the cross-head, a press-cap having a free connection with the press-screw, and a steady-bar connecting the press-cap with the press-screw, and with the screw-guide, substantially as and for the purpose set forth.

9. The combination of a press-screw, a spurtoothed ratchet-wheel fixed on the press-screw, a lever-head forked to embrace the ratchetwheel, and fulcrumed to oscillate on the press- IIO screw, and a double-acting spring-actuated i VILLIAM F. BARNES.4

Vitnesses:

A. O. Bnl-IBL, J Aeon BEHEL. 

